Ключевые слова: accident, adult, asphyxiation, atmosphere, atmospheric, authorization, banner, barricade, barrier, business, caution, commercial, concept, confined space, construction, danger, dangerous, design, detector, discretion, emissions, enforcement, environment, equipment, forbidden, h2s, hazardous, health, industrial, industry, inspecting, inspector, invention, isolated, machine, manhole, monitoring, occupation, operator, permit, permitting, professional, protection, restricted, safety, security, severe, supervisor, technology, warning,